Journal box construction



Oct. 20, 1931. A, O, B KIU 1,828,314

JOURNAL BOX CONSTRUCTION Original Filed May 22. 1929 Patented Oct. 20, 1931 UNITED STATES- PATENT OFFICE ALBERT O. avenue, cnxvmnn, OHIO, ASSIGNOR TO NATIONAL IALI'EABLE AND arm GB comm, OI CLEVELAND, OHIO, A CORPORATION OF OHIO JOURNAL nox Application filed It! as, 1919, Serial The present inventionrelates to journal boxes and more particularly to journal boxes of the roller bearing type intended more especially for use on freight and. passenger car trucks.

The present invention has for an ob ect to provide an improved construction of the type in which flexibility between the axle and the side frame of the truck is provlded 19 by so constructing the journal box and the cooperating parts of the side frame as to permit a limited angular movement and a 'mited lateral movement.

The nature and objects of the invention will be better understood from a description of a particular embodiment thereof for the purpose of which description reference should be had to the accompanying drawings forming a part hereof and m which- Figure 1 is a plan view of a journal box and a portion of the side frame in which It is carrie Fi 2 is a central sectional view of the side ame taken on the line 11-11 of Fig.

1, with the journal box in end elevation,

Fig. 3 is a diagrammatic sketch illustrating the relation of the cooperating bearing surfaces of the journal box and frame, and Figure 4 is a vertical sectional view so'showing the co-operation between the top of the box and the side frame, the box being shown in elevation.

Referring more particularly to the illustrative structure shown, the side frame A is formed with depending jaws 6, 7, the inward ly facing parts of which are channel-shaped so as to provide recesses 8, 9 to receive the side lugs 10 of the journal box B. At the top of the opening between the jaws 6 and 7 the frame is formed with a flat seat 12 to provide bearing for the top of the journal box B. Pins 13 are inserted through registering apertures 14 in the jaws 6 and 7 below the lugs 10 to prevent separation of the box from the side frame in case of derailment or during handling of the truck when disassembled from the car body. The pins may be held in position by suitable cotter pins as is usual in constructions of this type.

cons'rnnc'nox 110.3,980. Renewed my 11, 10:1.

Lateral movement of the side frame relative to the journal box and longitudinally of the axle is limited by u anding lugs 15, 16 formed on the journal ox and engaging the sides of the side frame. To provide for the lateral movement and angling of the journal box B, the engaging surfaces of the journal box and side frame are formed on suitable curves and necessary clearances are provided.

It is one of the advanta es of the present invention that the two su aces of each pair of engaging surfaces are formed on different curves in order to afford effective bearing in all relative positionsv of the journal box and frame. If the surfaces 20 of the bearing lugs 10 are formed on the same radius as the surfaces 21 on the side frame with which they cooperate, then in the event of angling and lateral movement of the journal box relative to the side frame, taking for example the position shown in Fig. 3 the contact would take place at the edge of the lug 10 and the whole pressure would be exerted on a relatively small contacting area. This is avoided in accordance with the present invention by forming the'two cooperating surfaces on curves of different curvature suitably selected to insure tangency at the points of engagement in all operative positions. Convenience of manufacture suggests that the curves should be arcuate and they are so'shown in the present drawings.

In Fig. 3 is shown the condition obtaining when the journal box is turned at an angle and moved laterally relative to the frame, as occurs, for example, when rounding a curve, if, due to the flexibility of the truck, one side frame advances ahead of the other. In the particular structure illustrated provision is made for a maximum angling of the truck and side frame of the order of two or three degrees. The surfaces 20 and 21 are so designed that during angling of the journal box the surfaces will'rock one on the other and in the extreme position the surfaces will be tangent to each other at a point 22 which is approximately three-fourths of the distance from the center line of the journal of intersection of the axis of the journal box and side frame. The relative curvatures of the two surfaces 20 and 21 may be calculated trigonometrically or they may be worked out by the out and try method to obtain the desired conditions.

The curvatures of the surfaces23-and 25 are also so related to each other as to provide a tangential bearing of one surface against the other in all operative positions of the journal box and side frame. The curvatures of these surfaces may be developed in substantially the same manner as the curvature of the surfaces 20 and 21 of the j ournal box lugs and side frame, but preferably the radius of curvature is substantially greater than the distance betwen the surfaces to provide relatively flat surfaces.

In layin out the bearin surfaces the clearances s ould be arrange to make provision for the lateralmovement' of the' side frame relative to the journal box which brings the surfaces 20 into engagement with the surfaces 21 toward one side of the frame. In some'c'ases the curvature of the surface 21 which would be -satisfactory for angular positions of the journal box would nevertheless give insuffic ent clearance when the journal box is moved. bodily to one side without angling. If this proves to be the case with the surfaces as tentatively laid out, then the clearances should be increased.

The top surface of the journal box is preferably curved longitudinall of the box, that is to say, longitudinally of the axle, to enga e the flat surface of the frame with a slight rocklng movement as shown in Figure 4.-

The foregoin particular description is illustrative mere y and is not intended as definmgathe limits of the invention.

I 0 im:

1 The combination of a journalbox and a side frame having complementary curved engaging surfaces to permit movement of the box relative to the frame, the two surfaces of each pair of engaging surfaces being of different curvature to permit rocking engagement.

. The combination of a journal box with a side frame, the box having a plurality of pro ections having curved faces arranged to co -operate with surfaces on the side frame of different curvature to permit the box to side frame, the box ha 1,aae,a14

'angle laterall and vertically with respect each to the box w ile the surfaces rock on other.

3. The combination of a journal box and a curved surfaces substantially at right ang es to each other co-operating with similar surfaces of different curvature on the frame, whereby angular flexibility between the box and side frame is attained.

4. The combination of a journal box with a side frame, the box having pro'ections at the sides, jaws on the side frame aving recesses in which the projections are secured, said projections and recesses having cooperating curved surfaces of difierent radii providing for angular movement of the box in a horizontal plane relative to the side frame,

and rocking of the engaging surfaces.

5. The combination of a journalbox and a side frame, the box and frame having complementary curved dissimilar surfaces to permit lateral angling betweenbox and frame and rocking of the surfaces, the said box and frame having also dissimilar engaging surfaces to permit vertical ang 6. The combination of a journa box and a side frame, the box having vertical curved surfaces substantially at right angles to each other cooperating with surfaces on the frame to permit lateral angling between the box and frame, the cooperating surfaces being spaced apart to allow limited bodily lateral movement between the box and the frame, the two surfaces of each pair of engaging surfaces being of sufliciently difl'erent curvature to afford tangential contact in all operative positions of the journal box.

7. A journal box and side frame connection in which cooperating curved surfaces are formed on the box and frame to provide angular flexibility therebetween, said cooperating surfaces being spaced apart to also provide for bodily lateral movement therebetween. the two surfaces of each pair of engaging surfaces being of difierent curvature to provide rocking engagement during angling of the journal box relative to the frame.

8. The combination of a journal box and a side frame. the box having projections at the sides and top provided with curved surfaces for en agement with cooperating surcurved surfaces of the top journal box proiection limiting the relative movement of the box and frame in another direction.

9 The combination of a journal box and a side frame, the box having projections at the sides extending into recesses in the frame,

the projections and recesses havin a substantial clearance therebetween to a ow both angular movement and bodily lateral movement between the journal box and side frame and having coactin surfaces of different curvatures t0 provi e rocking enga ement.

10. The combination ,of a Journ box and a side frame, the box having plrojections at the sides and top provided wit curved surfaces for engagement with cooperating surfaces on the frame, the corresponding surfaces of the box and frame having a substantial clearance therebetween, the surfaces at the top of the box being formed on radii substantially greater than the distance between them, thereby producing relatively flat surfaces, the curvature of the two surfaces of each pair of engaging surfaces being substantially difierent to provide rocking engaggment.

testimony whereof, I have signed my name to this specification this 18th day of ALBERT O. BUCKIUS.

a May, 1929. 

